Wire looping machine



NOV. 2, 1948. E, H, MlLLER 2,452,593

'WIRE LooPING MACHINE Filed oct. 11, .1945 2 sheets-sheet 1 ATTORNEY Nov. 2, 1948. E, H, MILLER 2,452,593

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Patented Nov. 2, 1948 wlan LoorING MACHINE Edward- H. Miller, Newark, N. J., assgnor to Federal Telephone and Radio Corporation, New York, N. Y., a corporation of Delaware Application October 11, 1945, Serial No.. 621,827

(Cl. Mil-104) Claims.

The invention relates tc a wire looping machine particularly for bending wires of different thickness to loops of different size.

' In many fields looped wires are used in great quantities for example, on the end of lead wires, each one of ther wires having the same size loop. These end loops have been made up to now in most cases by hand using merely auxiliary tools. However, if such looped wires are used in very large quantities the manual operation for producing such loops in wires becomes expensive.

VIt is, therefore, the main object of the present invention to provide means for looping one end of a wire of predetermined thickness and to provide means for preparing loops of different size.

With this and other objects in View the present invention will become apparent and will be clearly understood in connection with the accompanying drawings, in which;

Figure l shows a plan view of the wire looping machine;

Fig. 2 is a sectional elevation along the lines 2--2 of Fig. l;

Fig. 3 is a sectional view along the lines 3-3 of Fig. l;

Fig. 4 is a sectional View similar to that shown in Fig. 3, however, with a somewhat advanced position of the pull bar; and

Figs. 5 and 6 are parts of the plan view shown in Fig. 1 showing the loopers in two different advanced positions.

Referring now to the drawings, as shown particularly in Fig. 2, the wire looping machine comprises a base plate l, a center plate 2 and a top pla-te 3', all the plates being preferably of rectangular shape and connected by means of screws I" or the like, extending through all three plates.

The base plate I is equipped on its top with a groove fl which is centrally located and the bottom-'of which extends horizontally and then upwardly in inclined direction, as shown in Figs. 3 and 4l. A gear rack 5 is welded or otherwise attached tothe base plate I extending from the front to the rear.

The center plate 2 is equipped with a centrally located slot li which also extends from the front to the rear. Another gear rack l the purpose of which will be described later, is welded or otherwise attached to the center plate 2.

The top plate 3 has a longitudinally extending slot or cutout 8 of substantially oval shape. The right side ofthe cutout 8 (as seen in Fig. 1) is formed with integrally cut teeth toprovide a gear rack 9 the purpose of which will also be described,

2V later. It is also possible to insert a gear rack 9 into the .top plate 3 next to the right side of the cutout 8.

Preferably two bars I0 are provided on opposite sides of,- the base plate I to support the center'. plate 2 in spaced relation thereto. A bar II' is also provided between the plates I and 2 which serves the purpose of keeping the rack I3 formed by gear teeth on the. left margin of the pull bar I2: inmesh with a gear I4. In order to place the bar- Il in proper predetermined position, the right face of said bar is equipped with borings, I5 which are adapted to. receive the ends of set screws IB inserted in threaded borings I'l provided in the adjacent space bar' Ill. The gear I4 on one side engages the rack i3 on the pullv bar I2 and on the other side the stationary gear rack 5 mounted on the base plate I'. Upon moving the pull bar i2 which preferably is equipped with a handle I3', either from the front to the rear or the rear to the front the gear I4 will rotate and correspondingly move a pin I9 forming the axle for the gear I4 backwards or forwards. A small freely rotatable gear 20 is mounted between the plates I and 2 on the left side of the gear rack i3 of the pull bar I2 in order to prevent lateral movement of the latter.

Thev pin I9 extends through all three plates I, 2 and 3 and correspondingly the gear Ill is equipped withanV upward-ly extending flange 2l which is stepped insidewardl-'y on its outer circumference and equipped with a thread 22 which is adapted to receive a cap 23 having a corresponding internal thread. rThe lower portion of the pin I9 has a diameter correspond-ing to the inner diameter of the gear I 4, but extends upwardly with reduced' diameter to provide room for a surrounding spring 2'4, The spring 24 abuts at one end at the shoulder formed by the lower portion ofthe pin i9 of larger diameter and its upper end again-st the aforementioned cap 23. The upper end of the pin I9 extends through a central boring of the cap 23, said upper end of the pin being of still further reduced diameter.

Bars 25 arranged on the left and right side between the center plate 2 and the top plate 3 provide the spacing meansv therebetween. A gear 26, mounted between the center plate 2 and the top platey il, has a longitudinal slot 2l through which the ange 2I of the gear M extends. The gear 26 meshes with the previously mentioned gear rack l arranged on its left side and is kept in position by a bar 28 attached to the upper surface of the center plate 2.

Avsecond gear 291s placed in the oval cutout.

8 of the top plate 3 immediately above the gear 26, which gear 29 has also a longitudinal slot 39 through which the flange 2| with the cap 23 screwed thereto extends. A circular slot 3i is provided in the gear 29 for an angle of nearly 270, which slot 3l is adapted to receive studs 32 mounted in the gear 26. The gear 29 carries a looper sector 33 which extends for an angle of -about 90 and has at its inner end an arcuate cutout 34. The looper sector 33 is fastened to the gear 29 by means of screws 35 or the like and its position is assured by locating pins 36. Another looper sector 31, which extends also for an angle of about 90, is fastened to the gear 26 by screws 38 screwed into the studs 32 or the like, which looper sector 31 is aganiset in the proper position by means of locating pins 39 extending from the sector 31 into the gear 26. The looper sector 31 has also at its inner end an arcuate cutout 40. Both cut outs 34 and 49 may be of sector like shape, as clearly shown in Fig. 1.

The sector 33 is adapted to be turned together with the gear 29 and the sector 31 is adapted to be turned together with the gear 2E, the studs 32 sliding in the slot 3l of the gear 29 during the turning movement of the gear 26, The two adjacent faces of the looper sectors 33 and 31 form a slot, the purpose of which will be described later.

A regulating bar 4I which has a longitudinal slot 42 is fastened by screws 43,0r the like to the upper surface of the top plate 3, which bar 4I can be adjusted to the proper position by means of the slot 42. The bar 4I serves as abutment for the wire 44 (Fig. 1) to be looped in its initial position.

The machine is provided with a set of pins I9 of different diameters of its upper end and also with a set of looper sectors each of which is equipped with different sizes of sector-like cutouts 34 and 49, respectively.

Having described the elements which comprise the wire looping machine, the looping of wire is performed in the following manner:

Before starting the operation the regulating bar 4I will be set properly in accordance with the loop to be obtained from the wire 44 which in the initial position is set against the faces of the looper sectors 33 and 31 and against the front face of the regulating bar 4I. Then the bar I2 is pulled by means of the handle I8 in forward direction which movement of the bar I2 will turn the -gear I4 which will roll on the rack 5 and thus move the pin I9 also in forward direction. The cap 23 screwed to the ange 2| of the gear I4 will slide in the slots 21 and 39 of the respective gears 26 and 29 until the pin I9 which during this movement is raised from the rearward position (Fig. 3) to a raised position (Fig. 4), abuts against the wire 44 which is pressed by the pin I9 against the arcuate cutouts 34 and 49 thereby forming the initial loop in the wire (Fig. Upon further movement of the bar I2 the gears 2S and 29 are also pushed into forward direction and simultaneously turn in opposite direc tions since the upper gear 29 is in mesh with the gear rack 9 and the lower gear 2S in mesh with the gear rack 1. This movement of the gears 26 and 29 in opposite direction provide also a double movement for the two looper sectors 33 and 31, namely in forward direction as well as a turning movement together with the respective gears. Thus sector 33 moves counterclockwise with the gear 29 and the sector V31 clockwise together with the gear 26 until the position ShQWn in Fig. 6 is reached in which each sector moved for about By this movement the wire 44 one end of which formed an initial loop, Fig. 5, is further bent as shown in dotted lines in Fig. 5 and finally reaches the position shown in Fig. 6 in. which the wire will be turned entirely from the original sidewards position to a position extending backwards and at the same time the loop entirely closed surrounding the end of the pin I9. Upon return movement of the pull bar I2 the gears 26 and 29 and thereby also the sectors 33 and 31 will return to the original position and due to the return movement of the pin I9, the wire 44 will also be pushed backwards again whereby the pin I9 remains now in the previously formed loop. Since due to the groove 4 provided in the base plate I the pin I9 will be lowered again by means of pressure of the spring 24, the pin I9 will release the loop of the wire and the latter be free to be removed or to fall out.

As stated before a number of sets of different sectors as well as a set of pins are provided which allow the use of wires of different thickness as well as by using of sectors with sector-like cutouts of dierent size and by different setting of the regulating bar 4I loops of different sizes and shapes for wires of different thickness can easily be achieved.

While I have disclosed the principles of my invention in connection with a single embodiment, it will be understood that this embodiment is given by way of example only and not as limiting the scope of the invention as set forth in the objects and the appended claims.

What I claim is:

l. In a wire looping machine, two members, one face of each of said members extending in the same plane, cutouts in the adjacent ends of said members, a pin member mounted opposite the faces of said members, means for rotating each one of said members in a direction opposite to that of the other to a position in which the said faces are opposed, means for moving said pin member against and between said members during the rotating movement of the latter, said pin member being adapted to press the wire to be looped against the said cutouts of the said members, whereby the rotation of said members and the movement of said pin between said members completes the formation of a loop in said wire.

2. In a wire looping machine, two members each comprising a sector shaped element of about 90", one face of each of said elements extending in the same plane in the initial position of said elements, cutouts at the adjacent ends of said faces of the elements, a pin member mounted opposite the faces of said elements, means for rotating each of said elements in a direction opposite to that of the other to a position in which the said faces are opposed, means for moving said pin member against and between said sector shaped elements during the rotating movement of the latter, said pin member being adapted to press the wire to be looped against the said cutouts of the said members, said rotating movement of said elements and the forward movement of said pin completing the formation of a loop in said wire.

3. In a wire looping machine as set forth in claim l, said pin member comprising a pin and a gear, said pin mounted in said gear, a spring member adapted to keep said pin in its lowest position, means for lifting said pin against pressure of said spring during the movement of said pill. against seid faces of the members.

4. In a wire looping machine as set forth in claim 1, said two members comprising two gears in superposed position, a circular slot in the upper of said gears, two sector shaped elements, each one of said elements being fastened to one of said gears, means for rotating said gears in opposite direction.

5. In a wire looping machine, three plates in superposed position, spacing members between said plates adapted to keep each plate in predetermined spaced position from its adjacent plates, a longitudinal groove having an inclined face one end on top of the lowest of said plate, a pull bar having a rack inserted between the lowest and the center plate, a gear having an upward extension meshing said gear inserted between the lower and the center plate, a pin carried by said gear, said pin being adapted to move freely in axial direction, a spring keeping said pin in its lowest position in said groove of the lowest plate in the initial position, a longitudinal slot in said center plate and a wider slot in said top plate, a rack mounted on said center plate on one side of its slot, a rack mounted in the top plate on the other side of its slot, a gear inserted between the center and the top plate, another gear inserted in the slot of the top plate, both said last mentioned gears being adapted to rotate freely around the said extension of the said gear mounted between said lower and center plate, said gear inserted between said center and top plate meshing said rack mounted on said center plate, said other gear inserted in the slot of the top plate meshing said rack of the latter, a circular slot in said other gear, sector shaped elements screwed to said other gear and to said gear positioned below said other gear through said circular slot, longitudinal slots in said two snperposed gears, one face of each of said sector elements extending on one plane in its initial position and a regulating bar mounted on the said top plate positioned against the said face of one end of said sector elements.

EDWARD H. MILLER.

REFERENCES CITED The following references are of record in the file of this patent:

UNTED STATES PATENTS Number Name Date 582,283 Grimes May 11, 1897 2,393,364 Goldeld et al Jan. 22, 1946 

